. >>> and now we move onto modern health in america and something new from coca-cola, the soft drink giant. under mounting pressure about sugary soft drinks and the consequences for health, coke ads are about to sing a new tune. and here's abc's senior national correspondent jim avila on that. >> ice cold coca-cola. >> reporter: coca-cola in 1961, advertising the original coke as a diet beverage. >> there's no waistline worry with coke. >> reporter: but now, most studies say that's not true. so, today, a new ad from coke, claiming to be part of the obesity solution, not the problem. >> of more than 650 beverage, we now offer over 180 low and no calorie choices. >> reporter: coke buying a cable ad blitz tonight, reacting to a full-fledged assault on sugary sodas that include school bans, proposed taxes and an often-mocked new york city effort to eliminate large sizes. >> oh, no! i'm on the run from johnny law! >> reporter: but many feel it's no joke. after all, the average american gets 45 gallons of sugary soft drinks a year. that's 1 1/2 barrels of soda pop. in fact, sugary sodas ar